Securing means for lapped elements



Dec. 30, 1930. E. c. HARTER 1,787,108

7 SECURING MEANS FOR LAPPED ELEMENTS Filed Aug. 22, 1929 Patented Dec.30, 1939,

EVAN G. HARTER, OF STURGIS, MICHIGAN ma ns SECURING MnAns ron rinrrni)nrnivrnnrszf Application filed August 192a Serial 170.357,!319.

My invention relates to means for securing together in differentpositions of longitudinal adjustment, lapping elements such,

as for example, the legs of chairs, or stools,

[6] and cooperating members depending from the seats of such structuresand by the vertical adjustment of whichv on said legs the height atwhich the seat extends may be varied as desired.

My object is to provide novel, simple and economical means forthepurpose above stated and by the use of which relative adj ustment of theoverlapping elements may be v readily eiiected and the same heldsecurely in adjusted position.

Referring to the accompanying drawing in which my invention isillustrated as embodied in a chair, but without intending to limit it toembodiment in such a structure Figure 1 is a view in side elevation of achair embodying the invention. 7

Figure 2 is a plan sectional view taken at the line 2-2 on Fig. 1 andviewed in the direction of the arrows. I v I Figure 3 is an enlargedplan sectional view taken through one of the legs of the chair,

thesection being taken at the line 33 on Fig. 1 and viewed in thedirection of .the

arrow; and i v Figure 4, a view in side elevation of the structure atone corner of the chair.

I11 the arrangement shown the chair com prises four legs 5 grouped inrectangular formwith a restraining band 6 surroun-d ing the grouped legsbetween their'upper and lower ends and secured thereto. The chair alsocomprises a seat portion 7 provided at its corners with dependingmembers 8 adapted to lap, respectively, the upper ends of the legs 5,the legs 5 and the depending members 8 constituting elements to beconnected to- I gether in relative longitudinal adjusted position tocause'the seat portion 7 to extend at the desired height.

Each leg 5 is shown as containingan upper and a lower hole the lower oneor" which for one of the legs is represented at 9 in Fig. 3 V

and the depending inembers8 each contain a slot extending longitudinallythereof as represented 10 in Fig The side walls of the slot 10 containvertical rows of recesses 11 which .open into the slot/1O and aredisposedin opposed relation to each other as shown in Fig.4. p p I r Theopenings 9 inthe legs 5 and the re- T NT F FEiC cess ed slots 10 in them'embers'S are provided to receive. devices forsecuring the legs andmembers in adjusted" position, these devices in the particularconstruction shown comprising bolts 12 which extend through the openings9 and the slots 10.

The shanks 13 of the bolts are provided adjacent the heads 14 thereof,with oppositely extending projections 15 of a size to substantially fitinto any of the pairs of opposed recesses 11, as shown in Fig. 3 and,with the wallsofsuch recesses, form stop means hold ing the seatstructure 7 against descent.

To adjust the legs 5 and the members 8 relative to each other the nuts16 of the bolts 12are unscrewed'suliiciently to permit the bolts to bemoved lengthwise toa position in which the portions 15 of the bolts areremoved from the recesses 11 and the shanks proper 13 of the boltsextend into the slots 10. The legs 5 and members 8 may then,

without entirely removing the bolts, be ad-. justed lengthwise of eachother as the bolts slide, crosswise, along the slots if the adjustmentis effected by sliding the legs 5 j ing'beeneliected thebolts '12are'adjusted f to enter the portions 15 into opposed ones of therecesses 11 with which they register, and the nuts 16 then tightened.

While I have illustrated and described a particular constructionembodying my invention, and haveshown it as embodied in a particularkincl-of-structure, I do not wish'to beunde'rstood as intending to limitit thereto, as the construction shown 'may be variously modified andaltered, and the invention embodied in other kinds of structures,without departing from the spirit ofmy invention.

' 7 by Letters Patent, is:

In an adjustable chair, in combination, an

' element to be secured having a hole therethrough, an element in lappedrelation with the first mentioned elementythe second mentioned elementhaving aslot and lateral en largements of said slot at spaced locations,

said slot andits enlargements extending com- [pletely through the secondmentioned ele i ment', a fastening bolt,'saidbolt comprising asubstantially polygonal portion adapted to engage and substantiallycompletelyfil'l por-,

tions of the slot and the adjacent enlarge-- ments, a head extendingfrom said substantially polygonal portion and overlapping and contactingthe second mentionedelement, a

' shank extending from the substantially poly'gonal portion at the sidethereof opposite to the head, said shank extending through;

said hole, and a fastening member adjustably disposed on said shank andengageable against the first mentioned element.

- 7 V EVAN C.

